Cooling device for automotive brakes



s. G. DOWN COOLING DEVICE FOR AUTOMOTIVE BRAKES' Filed Feb. 2e, 1927 v May'ls, 1931.

INVENTOR SIDNEY GDOWN ATTORNEY .framed 19,1931

h"Au-Nrrau j STATES amm G. nowN, or nnenwoon, PENNSYLVANIA. AssIeNon 'ro 'run wns'rmsnousn v am anexa conraNY, or WILHEBDING, rmsYLvANu, n. conrom'rIoN or PENNSYLVANIA i COOLING DEVICE F@l A.UTOIOTIVE Bm appucationmea rebmary as, 1927. serial No. 171,182'.

gether with a' ortion ofthe web 6 ldefine a This invention relates to brakes for automotive vehicles, and more particularl to that type of brake in which a plurality o radially arranged arcuate brake shoes are movable B outwardly into en agement with the inner -brakin surface o a brake drum to apply the bra es and inwardly-to release the brakes,

. and has for an object the provision of novel means for cooling and `tendin to maintain cool, the brake shoes, brake ining, brake drum and associated arts. v

Another object of t e invention is to provide anautomotive vehicle brake drum with Ameans for inducin currents of air to flow through the drum or the purpose of maintaining the drum and the parts of the brake issociutecl therewith interiorly, comparativeyThese and other objects be apparent '2 from the following description.-

Referrin to' the drawings 'n `which like reference c aracters refer to like parts; Fig. 1 is an end elevational view of a brake drum embodying a portion ofthe invention; Fig.

u 2 is a 'side elevationalview ofthe same; Fig.

g 3 is a sectional view taken en the line 3-3 of Fig. 1 the brake spider, brake shoesand associated parts being illustrated; Fig. 4 is a sectional view taken .on the line 4-4 of 3 Fig. 3 the' drum being omitted; and Fig. 5 is a plan or face view of one Vozf the brake shoes.

Rafe now in detail to the drawin ,the reference caracter 1 indicates a brake' um having -a vertically disposed web 2 which is adapted to be secured to an automotive vehicle wheel (not shown). l This drum also `has a circumferential ange 3 which rovides an interior brakn surface 4 and i desired may also provide an exterior braking 'surface 5, either or both of whichsurfaces are ada ted tobe 'j aged b the usual'brake lining '(not sho or bra e shoes. Connecting the 'n 'comprises w Sand 10 andtheee walls' -rection across the drum fora but prefers.

web 2 and the dan e 8 there is an integral -surface 4 of the drum an pocket 11 whic communicates with the iniPATsNT orrlcs' terior of the brake drum throu h one ofthe openings 7. The wall9, for a s ort distance =is preferably in substantiallythe same vertical plane as thef-web 2 and then curved or sloped, so that at the place indicated by the interiorlyiof the brake drum, a web 13 is provlded which is pxreferably integral with, and

projects from, e interior sur ace of the web 6, and at one end is connected with an interior .curved lu 14 which is preferably concentric with the ange 3. The webs 13 and lug14 are so dis osed relative to the web 6- an the openings formed therein that the air which may enter the drum may be directedin a diinater more fully set forth.

Positioned' within the brake drum there is a non-rotating brake su port 15 which may be connected or forme integral with any purpose heresuitable part of an automotive vehicle. This support mag'Y `tegral therewith, such web being'concentric with the ange 3 of the brakedrum. Ex#

anges a pluralityof brake 'shoes -19 are mounted on the support v'which shoes, asis usual, vare preferabl1 of 'arcuate form and are arranged radia y.v around the support.

To o rate these shoes any suitable means' as been,

may used, but forfillustrative only the usual expansion tube 20 shown, which `tube when expanded will force the shoes into brakingengagement with the as the tube is being collapsed, will permit the shoes to be returned to their normal brake release position. Each of the brake shoes has air conducting channels 21 formedtherethrough,

be madeloffany suitable form y comprises a main web 16 an l a horizontally disposed circular web 17 intending outwardly from the web 17 and i spacedapart from each other transversely of t,

which channels are adapted to register at all times with openings 22 formed in the flanges 18 of the support 15.

Assuming the drum and the several parts of the brake, just described, to be applied to a vehic1e,'and the drum to be rotated in the flange 18 of the support and through the channels 21 formed in the brake shoes 19 and will be finally exhausted through the openings 22 in the other flange 18 of the support 15. It will be noted that all of the air entering the drum will not be forced through the brake support and the brake lshoes but some of it will, when the brake has been released, flow between the brake shoes and the inner surface 4 of the liange 3. .A

Assuming the drum to be stationary and it is in a heated condition, due to a long service application of the brake, the heated air in the drum will escape through the openings 7 at or near the top of the drum, and cool air .willy be admitted to` the interior of the drum through the openings 7 at or near 4 the bottom of the drum, thus these currents of air will effectively cool the drum when the drum is stationary.

From the foregoing description it will be seen that I have provided a cooling or venti-A lating system for the brake drum and its associated parts which will reduce to a minimum the liability of the over-heating of these brake parts and the Yconsequent damage thereto.

The brake drum has been illustrated and' described as a single integral member, but it will be understood that the several parts thereofmay be made separate and suitably secured to ether. It will also be apparent to those skilled in the art to which this invention appertlains, that changes may be 'made in the details and arrangement of the 50,* several parts of the brake without departing' from the spirit andfscope of the appended claims. f,

Having now described my invention, what I claim as new and desire to secure -by Let ters Patent, is:

1. A brake drumv or automotive vehicles, sa1d drum carrying means interiorly -and exteriorly thereof for inducing air currents therethrou h.

2. A br e drum for automotive vehicles, said drum having a Ventilating` opening formed therein, a projection on the exterior of said drum for forcing air into said openilg, and means on the interior of said drum, a jacent said opening, for directing the air owing throughsaid opening.

3. A brake drumfor automotive vehicles,

said drum havin Ventilating openings formed therein, an means within and forming a part of said drum adjacent said openings for, directing, interiorly of the drum, the Ventilating medium flowing through said openings.

4. A brake drum for automotive vehicles, said drum having Ventilating o enings formed therein, and means carried y said drum adjacent said openings, exterior y and interiorly of the drum, for directing currents of air from the exterior to the interior of the drum.

5. A brake drum for lautomotive vehicles, said drum having a web adapted to be secured to a wheel of said Vehicle, a brake ilange, a sloping web connecting said flange and securing web, said sloping web having Ventilating openings formed therein, means projecting from said sloping web, exteriorly of the drum, for inducing air to fiow through said openings, and means projecting r,from said web,

interiorly of th'e drum for ,inducing the air owing through said opening, to flow against said brake flan e.

6. A brake4 rum for automotive'vehicles, said drum havin a vertically disposed securing web-adapte to bev secured to a wheel of said vehicle, a horizontally disposed brake flange, a slopingweb connecting-said securing web and ange, and Ventilating means for said drum associated with said sloping web and arranged within thejvertical plane of said sloping web.

7 The combination with a brake for automotive vehicles, of a support for a portion of said'brake, a brake drum, brake .shoes mounted onvsaid support and movable into or out of engagement with said drum, and means exteriorly and interiorly of said drum for inducing air to flow through said shoes said means being carried by' said drum.v

8. The combination with a brake for autort for a portion 9. A brake drum for'automotive vehicles, i

said drum comprising a sloping web havin a ventilatin opening formed therein, a hoo projecting om one side of said web adapted to direct a current of air through said opening to the interior of said drum.

and out vof engagement with said drum, said shoes having Ventilating passages therethrough with which the openings in said drum are adapted to register, and means on said drum and arranged `interiorly thereof for directing air currents, entering said drum through said openings, to the Ventilating passages through said shoes.

11. A brake drum for automotive Vehicles, said drum having a securing web, a brake ange, a web connecting said securing web and flange and having a Ventilating opening formed therein, and a projection on the exterior of said drum within the outsidel lines ofsaid securing web and flange for conducting air to said opening.

12. A brake drum or automotive Vehicles, said drum having vVentilating openings formed therein, a securing web for said drum, a braking flange, and hood means on the exterior of said drum arranged wholly within the outside lines of said web and ange for forcing air to flow through said openings into the interior of the drum.

In testimony whereof I have hereunto set my hand.

SIDNEY G. DOWN. 

